rtraphael

for %%c in (0, 1, 50) do (for %%a in (0 1 2 3 4 5 6 7 8 9 A B C D E F) do (for %%b in (F E D C B A 9 8 7 6 5 4 3 2 1 0) do (color %%b%%a))
color 00

rtraphael

@echo off

for %%c in (0 1 2 3 4 5 6 7 8 9) do (
    for %%a in (0 1 2 3 4 5 6 7 8 9 A B C D E F) do (
        for %%b in (F E D C B A 9 8 7 6 5 4 3 2 1 0) do (
            color %%b%%a
        )
    )
)
color 00